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Dr. Fix-It
Dr. Fix-It, Handyman
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Experience:  Work on all parts of home construction & maintenance
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I have a flat roof that slants. Its 8 ft 8 inches and after

Resolved Question:

I have a flat roof that slants. Its 8 ft 8 inches and after a 20 foot run its 8 foot 4 inches. What is the pitch of this roof?
Submitted: 1 year ago.
Category: Home Improvement
Expert:  Dr. Fix-It replied 1 year ago.


Hi I am Dr.Fix-It, Your online expert ready to assist you...

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With only a 4" rise you have a slight slope or pitch of 0.2

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reference > http://www.pole-barn.info/roof-pitch.html

graphic

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Can see a good visual and the angle 0.95° here as well > http://www.blocklayer.com/pitchangle.aspx

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Have a look and let me know if that helps you out, thanks.

Customer: replied 1 year ago.

That means for every 1 foot of run the roof drop by .2 tens of an inch??? .2 x 20 =4.0, What angle does this equate to? Try using 22 feeT 2 inches as my previous measures were just approximations not exact.

Expert:  Dr. Fix-It replied 1 year ago.

Bill with 20' and 4" rise have 0.2 pitch which comes to angle 0.95°... by extending the distance to 22'-2" with the 4" rise the pitch is dropped to 0.18 and angle to 0.86°

 

graphic

 

Customer: replied 1 year ago.

That is the slope of the roof. Much steeper slope on the attached room where rain runs off onto the garage

Expert:  Dr. Fix-It replied 1 year ago.

Even the gradual slope should allow the water to run off, just not at as fast rate then the steeper additional.

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If considering reworking the existing for better drainage, can possibly overlay a new higher pitch roof panels over the existing space.

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See > http://www.vpmetalroof.com/replacement-roofs/retrofitting-over-flat-roofs.html

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http://www.thisoldhouse.com/toh/article/0,,1127447,00.html

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Please rate my answer EXCELLENT now since we have worked on the issue together to your satisfaction. Bonuses are welcomed & appreciated. Thank You. . . Remember Dr.Fix-It on any future inquires > http://www.dr-fix-it-advise.com/ <

 

Customer: replied 1 year ago.

When put the 4x8 plywood 5/8 the sheets on the roof can I lay them but to but. I'll rate you later

Customer: replied 1 year ago.

Do I need 1/8th space for the roof 4x8 sheets of plywood on the roof?

Expert:  Dr. Fix-It replied 1 year ago.

Hi Bill sorry for the delay been having some site issues today... Yes can lay new 4x8 sheeting and use 16d nails between the seems to leave 1/8" gap between the joints for any expansion.

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graphic

Customer: replied 1 year ago.

Do you see any good advantage appling rubber self stick 4 inch tape all over the seams before going ahead with the roll rubber roofing adhesive applied?Would this be over -kill

Customer: replied 1 year ago.

pl;ease reply soon

Expert:  Dr. Fix-It replied 1 year ago.

If were using only tar paper then the tape would help ensure a good seal along the plywood seams. . . Since using a rubberized underlayment then do not need to apply any tape on seams.

 

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Dr. Fix-It, Handyman
Category: Home Improvement
Satisfied Customers: 2876
Experience: Work on all parts of home construction & maintenance
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